Drum construction



Nov. 19, 1929; J. B. TRIPLE-'I'T mum CONSTRUCTION Filed Sept. so, 1925 2Sheets-Shget 2 INVENTOR. JAMES B.TRIPLTT A TTORNE Y.

?atented Novrl W29 I g I g i Egfig tra erase rarer r r AMEsfB. T IPLETT,or LONG BEACH, CALIFORNIA DRUM consrrwo'rron Application filed September30, 1925. Serial No. 59,560.

This invention relates to earthboring maare provided as at2 1. Theseareadaptedtobe chinery. a operated through a control lever 25.

The general object of the invention is to Mounted on each end of'theline shaft 17 vI provide an improved cat head for use in drillshow a cathead or auxiliary drum 26,:a nd ining machinery. i termediate these catheads I arrange another 55 One of the specific objects of the inventiondrum S0, embodying the features of my inis to provide a cat head whichis provided vention. I wish it to be understood, however, with novelmeans for clutching it to the drivthat the drum 30 may be placed at theends of I ing shaft. the shaft 17 or in any position other than Anotherobject of the invention is to prothat indicated. It is preferably placedad- 0 vide a cat head wherein, an internal clutch jacent the enginesprocket simply for the sake is provided for actuating the cat head. ofconvenience since its construction and uses Another objectof theinvention is to prodo not limit its utility to any particular vide a cathead wherein the control member locality. a I

" for operating the cat head is arranged within In the constructionofdrums of the type 65 l the lin shaft on which th jcat. h ad is hereinreferred to it is essential that the drum mounted, a H "be mounted sothat itvmay remain stationary Otherobjects of the invention will be ap-While the'llne shaft 17 is rotating and it is i; f th f llowi g d scriti t k n also necessary that provision be made for i 20 in connectionwith the accompanying drawquickly and positively conn t g and ingswherein j v connecting the drum withthe line shaft. The- Fig. 1 is anelevationof apart of an earth, ability. to afford positive operation isno more boring machine showing my cat head applied ssen ial than theability to give quick acthereto; r 1 I tion and with my invention bothrequire 2 is a central sectional view through a ments are'satisfied- I Icat h ad embodying th f atur f my in- My improved drum includes abushing 31 venfion; I r Y which is connected on the shaft 17 by means.Fig. 3 is a view similarto Fig. 2 taken at ak y 2 Shown n g- 2- A eachend 7 .right angles. thereto; of the bushing 31 I arrangea ring 3% whlch0 Fi 4. i a d; vlew of th c bh a; is held to the bushing by means ofbolts 32 so Fig.5 is a section on line 5f5rFigl2, and and UPOII fl g Imount a drum Fig. 6 is a sectional viewof a modification. which includethe fl g d d POYtiOIlS j Referring to the drawingby referencechar- 34and the Cable receiving Po t I .acters, I'have shown my inventionas em-This drum is rabbeted at each end as-at I 35 "bodied in a portion of adrillingdevice into receive e rings 32a). The middle p 5 tion of thedrum '18 spaced from the ad- 'jacent portion of thebushing 31'so that asplit collar 38 may be mounted between these eluding a frame 10in whichthe draw works is mounted. The frame 10 includes a shaft 11 on which ahoisting drum 12 is mounted. The drum is adapted to be driven through adrum sprocket l t which may be controlled by a. 7 vh i driven anarrateates-38 01mm 'whlchpasses a drum drlvmg wedge block 40, theopposite face ofw hich sprocket l6cmounted on a line shaft 17 The p d tth tapered. faces 39 and the two portions. The split collar 38has'itsad-- jacent faces 39tapered with respect to each *line shaft 17has the engine sprocket 18 there-. construction is such. that as theWedge 4:10 i

on and also the rotary drive sprocket 19. Tl1is moves lengthwise iengagement h h Shaft y be P P t a q q holstltlg faces 39 it will spreadthese faces thereby sprocket 20 Which hro gh a challl 21 W111 increasingthe diameter of the collar 38 and drive thesprocket 22 and the shaft 11when a causing it to tightly engage the inner cylin: H

55 clutch 23 is operated. Suitable brake drums drical surface 11 of thedrum 30. f

' -The collar 38 is provided with a key 42 which fitsin a keyway in thebushing 31 so that the collar is constrained to move with the bushing asthe latter rotates with the line shaft 17. As a result, when the blockmoves to operative position it will cause the drum to rotate with theshaft 17.

' Itis a well recognized fact that clutches such as I have described arequick and positive in their action and for this reason it will beapparent that a positive quick acting gripping action will be producedfor controlling the rotation of the drum.

In order to move the block 40 I provid aligned slots and 46 in thebushing 31 and in the line shaft 17. Within the slot 45 I mount a pin 47and on this pin I pivot an operating dog 48 which has ahead 49 thereon.The head 49 is preferably rounded at its side edges and fits in anaperture 50 in the block 40. The end 51 of the dog 48 is rounded and isfitted within a slot 52 which i is arranged in'a rod 53- This rod 53 ismounted in a central cylindrical bore 54 inthe shaft 17, p

By'l'ocating the rod 53 within the line shaft 17 I overcome alldifiiculties which would be present if the operating member was disposedoutside of this rod although it will be understood that the operating'member may be otherwise located if desired.

In order to control the member 53 from the operators position I providea member 54- which is connected to the rod 53 as shown in Fig. 1. Thismember 54 is providedwith a portion 55 which is supportedto slide inhangers 56. This member 55 is provided with an operating portion 57 bywhich it can be grasped and moved to position. 'der to provide means fornormally holding the clutch in. disengaged position I arrange a I holdsthe parts in assembled position.

throw the drum into action he will pull'the member 57 to the left inFig. 1 thereby moving the rod 53 to the left in Fig. 2 thus moving theblock 40 tothe right causing it to expand the collar 38 thereby lockingthe drum to the shaft. When he wishes to release the drum he willrelease the member 57 and the parts will at once disengage.

In the modified form of my invention shown in Fig. 6 the shaft 17 thesplit collar 38 and'the collar 32 are of a; construction similar to thepreferred embodiment. On the collar 32 I mount a ball race whichsupports the drum 30 so that this drum may.

In or-.

rotate freely on the collar 32. In Fig. 6 I also show another means foroperating the clutch. This means includes a wedge block 40' which isadapted to engage the opposed faces of the collar 38. This wedge block40' has tapered sides thereon and is provided with an extension 71 whichis secured to a sleeve 72. The sleeve 72 is splined tothe shaft at 73 sothat the sleeve 72 is compelled to rotate with the shaft 17.

The sleeve 72 is provided with a groove 74 therein which receives pins75 mounted on a yoke 76. As the yoke is moved longitudinally along theshaft 17 the collar 2 will be moved and thus the wedge member 40' willbe moved to actuate the clutch- Having thus described my invention, Iclaim:

1. Inta device of the class described, a line shaft having an aperturetherein, means to drive said line shaft, a drum mounted to rotate freelyabout the line shaft, means within the drum to clutch the drum to theline shaft, said clutch means comprising a split collar, means in saidaperture for controlling the first mentioned means, said controllingmeans comprising a member engaging the edges of the split collar andmovable longitudinally along the collar to. expand the same.

2. In a device of the class described, a line shaft, a bushing fixedthereon, a drum mounted to rotate about the bushing, means within thedrum for clutching thedrum to the bushing, and means tooperateltheclutching means, said last mentioned means including an actuating memberengagingsaid clutching means and rotatable with said shaft and bushing,a'longitudinally movable member disposed'within the line shaftand'operatively engaging said actuating member, means to normally urgethe clutch to lnoperatlve pos1t1on and an operating member connected tosaid actuating member and shiftable to move the clutching means toactive position.

3. In a device of the class described, a supporting frame having a shaftthereon, means to drive said shaft, a bushing keyed on said shaft, apair. of end rings, one at each end of said bushing, a drum mounted torotate on said rings, and a clutch mounted within said drum, said clutchincluding a split collar, and said collar being keyed to said bushingand means to expand said collar; i

4. In a device of the class described, a supporting framehaving a shaftthereon,

means to drive said sh ft, a ushing keyed.

on said shaft, a pair of end rings, one at each end'of said bushing, adrum mounted torotate on sa1d rings, and a clutch mounted within saiddrum, said clutch including a split collar, said collar'being keyed to 7said bushingand means to expand said collar, and sa d means comprising amember movable between the opposed faces of said collar. O

5. In a device of the class descrlbed, a

supporting frame having a shaft thereon,

means to drive said shaft, a bushing keyed on said shaft, a pair of endrings, one at eachend of said bushing, a drum mounted to rotate on saidrings, a clutch mounted Within said drum, said clutch including a splitcollar, said collar being keyed to said 1 bushing, means to expand saidcollar, said means comprising a Wedge shaped metal member movablebetween the opposed faces of said collar, said member having a holetherein, means to move said member, said last mentioned means includinga pivoted dog mounted on said bushing, said dog having a rounded portionat one end thereof, said shaft being hollow, and a rodmounted to move insaid shaft, said rod having an aperture therein, and said aperturefitting said rounded portion of said dog whereby movement of said rodvvillrock said dog to thereby operate the clutch.

6. In a device of the class described, a supportin frame having a lineshaft there- I on, a bus ing keyed to said line shaft, a

pair of annular collars one at each end of said bushing, a drumrotatably mounted on said collars, said drum having a cylindrical innersurface spaced, from the surface of said bushings, a split collararranged between the drum and the bushing, said s lit collar havinginclined opposed faces, a We ge block having inclined faces, said blockbeing slidable along said bushing, said split collar being keyed'to saidbushing, and means to move said block, said means including a dog, ashaft mounted on said bushing, said dog being pivoted to said lastmentioned shaft, said line shaft having a central aperture therein, anoperating rod movable in said aperture, said rod having a hole there-.in and said dog having a part thereof fit-' ting in said hole and meansto move said rod, said means including an operating memher having aportion thereon mounted on the frame and a handle for moving theoperating member. I

' In testimonywhereof, I hereunto affix my signature.

JAMES B. TRIPLETT.

